Stellantis has introduced the FPW 9.55535/xx series to unify the engine oil specifications across its brands—Peugeot, Citroën, Opel, Fiat, Jeep, Alfa Romeo, and others. This system replaces the variety of legacy PSA, FCA, Opel/Vauxhall, and GM specs with a single, structured family of standards for both service and factory fill oils. It’s a move driven by the need for clarity, consistency, and compliance with evolving performance and emissions standards.
Why a Unified Specification?
Legacy specifications varied significantly between Stellantis’ constituent brands. PSA used the B71 series, Opel used GM-LL and Dexos specs, and FCA had its own 9.55535 codes. The FPW system harmonizes these under one umbrella, reducing complexity for workshops and suppliers. These new specs incorporate updated industry sequences (ACEA 2023, API SP/GF-6) and Stellantis-specific tests to ensure higher durability, lower emissions system wear, and improved fuel efficiency.
Core FPW Specifications: 01, 02, 03
FPW 9.55535/01 (0W-20):
Low-viscosity, low-SAPS oil for new gasoline and diesel engines with GPF/DPF. Replaces PSA B71 2010 and FCA DM1. Built around ACEA C5/C6 with added timing chain and LSPI protection.
FPW 9.55535/02 (0W-30):
Mid-SAPS 0W-30 for fuel-efficient diesel and gasoline engines with aftertreatment systems. Replaces PSA B71 2312 and various FCA/Opel equivalents. Aligns with ACEA C2 plus Stellantis-specific piston and turbo deposit requirements.
FPW 9.55535/03 (5W-30):
Mid-SAPS 5W-30 for most modern Stellantis engines. Introduced after timing belt wear issues in PureTech engines. Replaces PSA B71 2290/2297, FCA S1/S3, and Opel Dexos2. Built on ACEA C3 with reinforced LSPI, wear, and soot handling capabilities.
Overview of All FPW Specifications
| FPW Spec | ACEA / API Category | Replaces Legacy Specs | Notes (Application) |
| FPW 9.55535/01 0W-20 Low-SAPS |
ACEA C5/C6 API SP |
PSA B71 2010 FCA 9.55535-DM1 |
0W-20 low-SAPS oil for new engines with GPF/DPF. Delivers fuel economy and wear protection. |
| FPW 9.55535/02 0W-30 Low-SAPS |
ACEA C2 API SP |
PSA B71 2312 Opel: Dexos2 FCA 9.55535-DS1FCA 9.55535-GS1 |
0W-30 low-SAPS oil for Euro 6 diesel and gasoline engines. Supports DPFs and extended drains. |
| FPW 9.55535/03 5W-30 Low-SAPS |
ACEA C3 API SP |
PSA B71 2290
PSA B71 2297 FCA 9.55535-S3 |
5W-30 mid-SAPS oil for modern engines. Optimized for LSPI control and timing-belt protection. |
| FPW 9.55535/04 0W-40 High-SAPS |
ACEA A3/B4 API SN/SP |
Chrysler MS-12633 | Performance 0W-40 oils for sporty gasoline engines. Typically aligns with MB 229.5 and Porsche A40. |
| FPW 9.55535/05 5W-40 Low-SAPS |
ACEA C3 API SN/SP |
FCA 9.55535-S2 | 5W-40 C3 for DPF-equipped engines under severe conditions. Higher viscosity where 5W-30 is too light. |
| FPW 9.55535/06 5W-30 High-SAPS |
ACEA A3/B4 or A7/B7 API SP |
Opel GM-LL-A-025 | High-SAPS 5W-30 for older gasoline/diesel engines without DPF. Strong wear protection with some fuel economy. |
| FPW 9.55535/07 10W-40 High-SAPS |
ACEA A3/B4 API SN/SM |
PSA B71 2300 FCA 9.55535-G2FCA 9.55535-D2 |
10W-40 semi-synthetic for Euro 4 and earlier engines. |
| FPW 9.55535/08 15W-40 High-SAPS |
ACEA A3/B3/B4 API SL/SM |
PSA B71 2294 FCA 9.55535-G2FCA 9.55535-D2 |
Mineral 15W-40 for very old or high-mileage engines. |
| FPW 9.55535/09 10W-60 High-SAPS |
ACEA A3/B4 API SN |
FCA 9.55535-H3 | 10W-60 for high-performance or track-oriented models. |
| FPW 9.55535/10 5W-40 High-SAPS |
ACEA A3/B4 API SP |
PSA B71 2296 Opel GM-LL-B-025 FCA 9.55535-N2FCA 9.55535-Z2 Chrysler MS-12991Chrysler MS-10725 |
Robust 5W-40 for older high-performance gasoline/diesel. |
Implementation Timeline
The rollout follows two key milestones:
– January 2026: FPW/01, /02, /03 become the official service and factory fill specs.
– July 2026: All legacy PSA, FCA, and Opel specifications are deactivated.
Notably, FPW/03 was required earlier for engines affected by timing belt issues. Oils must be reapproved to the latest spec indices by mid-2026 to retain Stellantis approval status.
Transitional Placeholder Specs
Several interim FPW specs were used during development, including FPW 9.55535/DH1, /G1, /GSX, /M2, /N2, /S1, /S2, /T2, and /Z2. These are no longer valid for new approvals and will be fully retired by mid-2026.
What This Means for Formulators and Workshops
Oil blenders must prepare for Stellantis’ updated requirements, which go beyond standard ACEA/API sequences and include proprietary tests. Q8 has aligned its formulations accordingly, based on legacy spec coverage and FPW performance targets. Workshops should monitor updates to technical datasheets and rely on product recommendations aligned with current and upcoming Stellantis applications.
Conclusion
The FPW series simplifies oil specification across Stellantis brands, while setting a higher technical bar. Clear timelines are in place, and compliance will be essential. For lubricant professionals and workshops, preparing now ensures alignment with Stellantis’ evolving requirements and supports proper engine protection and specification coverage as the FPW transition progresses.
Q8 Lubricants Corresponding to Stellantis Specifications
Below is an overview of Q8 lubricants recommended for use in applications covered by the legacy PSA, FCA, Opel, and GM specifications that Stellantis is transitioning to the FPW 9.55535 framework. These products are formulated to meet the performance requirements of those legacy specifications and are expected to align with the corresponding FPW categories, subject to formal validation. Official Stellantis approvals will be listed on product datasheets once granted.
| FPW Spec | Q8 Product |
| /01 | Q8 Formula Special FE 0W-20 |
| /02 | Q8 Formula Elite C2 0W-30 |
| /03 | Q8 Formula Elite FPW 5W-30 |
| /04 | Q8 Formula Excel Long Life 0W-40 |
| /05 | Q8 Formula Special M 5W-40 |
| /06 | Q8 Formula Special RN 5W-30 Q8 Formula Prestige V 5W-30 Q8 Formula Prestige C2/C3 5W-30 |
| /07 | Q8 Formula Advanced 10W-40 Q8 Formula Plus 15W-40 |
| /08 | Q8 Formula Advanced 10W-40 Q8 Formula Plus 15W-40 |
| /09 | Q8 Formula F1 Racing 10W-60 |
| /10 | Q8 Formula Excel Long Life 5W-40 |
